How to use Matrix3D.appendTranslation()? - actionscript-3

Question

With stage 3d I set up a basic triangle, and I can use append rotation and append scale and everything works, but using append translation on the z axis, the triangle will dissapear with the translation being 1 or higher. With other shapes it would dissapear with only 3 or higher. And it doesn't look like the triangle is getting any smaller/farther away between 0 and 0.9 translation. The translation on the x and y axis do work though.
Here are my shader codes:
private static const VERTEX_SHADER_SOURCE:String = "m44 op, va0, vc1";
private static const FRAGMENT_SHADER_SOURCE:String = "mov oc, fc0";
my render loop:
addEventListener(Event.ENTER_FRAME, enter);
var t:Number=0;
function enter():void {
context3D.clear();
context3D.setProgram(program);
var m:Matrix3D = new Matrix3D;
m.appendTranslation(0, 0, t);
t+=0.01;
context3D.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX, 1, m, true);
context3D.setVertexBufferAt(0, buffer, 0, Context3DVertexBufferFormat.FLOAT_3);
context3D.setProgramConstantsFromVector(Context3DProgramType.FRAGMENT, 0, color);
context3D.drawTriangles(indexBuffer);
context3D.present();
}
my full code:
var assembler:AGALMiniAssembler = new AGALMiniAssembler();
assembler.assemble(Context3DProgramType.VERTEX, VERTEX_SHADER_SOURCE);
if (assembler.error) {
trace("vertex shader error " +assembler.error);
return;
}
var vertexShaderByteCode:ByteArray = assembler.agalcode;
assembler.assemble(Context3DProgramType.FRAGMENT, FRAGMENT_SHADER_SOURCE);
if (assembler.error) {
trace("fragment shader error " + assembler.error);
return;
}
var fragmentShaderByteCode:ByteArray = assembler.agalcode;
var program:Program3D = context3D.createProgram();
try {
program.upload(vertexShaderByteCode, fragmentShaderByteCode);
}
catch (err:Error) {
trace("couldnt upload shader program" + err);
return;
}
color = new <Number>[0.9296875, 0.9140625, 0.84765625, 1];
var verts:Vector.<Number> = Vector.<Number>([
0.5, 0, 0,
-0.5, 0, 0,
0, 0.5, 0
]);
var buffer:VertexBuffer3D = context3D.createVertexBuffer(3, 3);
buffer.uploadFromVector(verts, 0, 3);
var indices:Vector.<uint> = Vector.<uint>([0, 1, 2])
var indexBuffer:IndexBuffer3D = context3D.createIndexBuffer(3);
indexBuffer.uploadFromVector(indices, 0, 3);
addEventListener(Event.ENTER_FRAME, enter);
var t:Number=0;
function enter():void {
context3D.clear();
context3D.setProgram(program);
var m:Matrix3D = new Matrix3D;
m.appendTranslation(0, 0, t);
t+=0.01;
context3D.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX, 1, m, true);
context3D.setVertexBufferAt(0, buffer, 0, Context3DVertexBufferFormat.FLOAT_3);
context3D.setProgramConstantsFromVector(Context3DProgramType.FRAGMENT, 0, color);
context3D.drawTriangles(indexBuffer);
context3D.present();
}